prefer logging to print

[prjemian]

Consider use of the python logging module instead of print().

see:

• https://stackoverflow.com/questions/6918493/in-python-why-use-logging-instead-of-print
• https://www.loggly.com/blog/4-reasons-a-python-logging-library-is-much-better-than-putting-print-statements-everywhere/

Quoting the latter:

The Python logging library lets you:

• Control what’s emitted
• Define what types of information you want to include in your logs
• Configure how it looks when it’s emitted
• Most importantly, set the destination for your logs

See this logging setup for bluesky in the use_bluesky repository. Here are examples of how it is used: logger.info() and logger.warning()

The USAXS describes and shows examples of the log files produced by this logging.